Publisher: Bachudo Science Co. Ltd

The Effect of Interval Between Harvests and N-Fertilizer Application On Tiller Production and Yield Attributes of Field Swards

W. Ubi, V. E. Osodeke
KEYWORDS: Interval between harvest, nitrogen fertilizer. tiller production. yield attributes of field swards

ABSTRACT:

Tiller population and reld attributes as influenced by interval of harvests (4, 6, 8, and 10 weeks) and N. fertilizer application (0, 100 150 and 200kg Nha· ) on field swards was investigated in April 2004 and 2005 using swards of grasses established at lwuru in march, 2003. The results showed that both intervals between harvest and N-fertilizer application exerted significant effects on tiller production and yield attributes of each species of grass. On the average, there was 22.2% increase in the number of tillers produced for every increment of 50kg Nha·'. Increasing interval between harvest consistently increased the number of tillers produced up to plots cut every 8 weeks with no further increase in plots cut ever 10 weeks The species differed in their potentialsfor new tiller formation and regrowth. The pattern of response and number of tillers produced by northern gamba grass (Ngg) was significantly (P<0.05) higher than that of guinea grass (Gg) when given the same treatment For every addition of 50kg Nha· 1 there was a corresponding increase in the dry matter yield (Dmy) of green leaves up to 150kg Nha·1 with no further increase in plots that had 200kg Nha· 1 The dry matter yield of dead leaves and stem were increased by increasing interval between harvest and by increasing N-fertilizer application. The dry matter yield of inflorescence was not statistically significant The implications of theseresults are discussed in light of field sward management


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